CN211047315U - Non-isolated constant-voltage constant-current output L ED driving power supply - Google Patents
Non-isolated constant-voltage constant-current output L ED driving power supply Download PDFInfo
- Publication number
- CN211047315U CN211047315U CN201922050949.3U CN201922050949U CN211047315U CN 211047315 U CN211047315 U CN 211047315U CN 201922050949 U CN201922050949 U CN 201922050949U CN 211047315 U CN211047315 U CN 211047315U
- Authority
- CN
- China
- Prior art keywords
- module
- output
- resistor
- power supply
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005070 sampling Methods 0.000 claims abstract description 41
- 239000003990 capacitor Substances 0.000 claims description 34
- 238000004146 energy storage Methods 0.000 claims description 13
- 101500023488 Lithobates catesbeianus GnRH-associated peptide 1 Proteins 0.000 claims description 10
- 230000001419 dependent effect Effects 0.000 claims description 4
- 241000592183 Eidolon Species 0.000 claims description 3
- 101100027017 Caenorhabditis elegans ntc-1 gene Proteins 0.000 claims description 2
- 238000002955 isolation Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 239000003086 colorant Substances 0.000 description 3
- 101100100146 Candida albicans NTC1 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Abstract
The utility model provides a non-isolation constant voltage constant current output L ED drive power supply, power input end pass through the rectification module and are connected with power control module, power control module is connected with switch module, voltage sampling circuit, current sampling circuit, high frequency transformer respectively, the switch module contains control end, input and output, the input of switch module and the output positive terminal electricity of rectification module are connected, and switch module's output and current sampling circuit are connected, and switch module's control end and power control module are connected, switch module, voltage sampling circuit, current sampling circuit are connected with high frequency transformer respectively, and high frequency transformer is connected with two at least power output modules, and power output module and output interface circuit are connected, the power output module includes mos FET, IGBT or relay.
Description
Technical Field
The utility model relates to an L ED drive power supply especially relates to a non-isolation constant voltage constant current output L ED drive power supply.
Background
L ED is popular because of its small size, low power consumption, long life, etc., whereas in L ED light fitting, L ED driving power directly affects L ED life and reliability, in the existing L ED driving power circuit, because of some non-linear elements, the circuit contains a lot of harmonic waves, which reduces the power factor of the input circuit, and causes unsafe power supply operation, pollution to public power system, easy circuit failure, and single function.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model discloses a non-isolation constant voltage constant current output L ED drive power supply, safe and reliable more to L ED drive power supply's function has been extended.
To this end, the technical scheme of the utility model is that:
a non-isolated constant-voltage constant-current output L ED driving power supply comprises a rectifying module, a switch module, a power supply control module, a voltage sampling circuit, a current sampling circuit, a high-frequency transformer and at least two power output modules, wherein a power supply input end is connected with the power supply control module through the rectifying module, and the power supply control module is respectively connected with the switch module, the voltage sampling circuit, the current sampling circuit and the high-frequency transformer;
the switch module, the voltage sampling circuit and the current sampling circuit are respectively connected with a high-frequency transformer, the high-frequency transformer is connected with a load and at least two power output modules, and the power output modules are connected with an output interface circuit;
the power output module comprises a mos FET, an IGBT or a relay.
By adopting the technical scheme, the high-frequency transformer provides a stable power supply for an external load, the power output module can be connected with various output interface circuits, and the various output interface circuits can be conveniently connected with a single chip microcomputer, so that various functions are realized. The power output module consisting of the mos FET, the IGBT and the relay has the advantages of large output current, high output power, small heat productivity, high reaction speed and the like.
As a further improvement, output interface circuit includes WIFI module interface end, RF module interface end, 2.4G module interface end, bluetooth module interface end, infrared module interface end, tianmao eidolon module interface end, amazonon module interface end, miniatur module interface end, little love module interface end, two at least in the GOOG L E module interface end adopt this technical scheme, can conveniently connect the WIFI module, the RF module, 2.4G module, the bluetooth module, infrared module, tianmao eidolon module, amazonon module, miniatur module, little love module, GOOG L E module etc. more can realize the application of intelligent house, the dimming in high pressure L ED paster lamp area, mixing of colors and various dynamic effects.
As the utility model discloses a further improvement, non-isolation constant voltage constant current output L ED drive power supply includes the electromagnetic compatibility circuit, and power input end and electromagnetic compatibility circuit connection, the electromagnetic compatibility circuit is connected with the rectifier module.
As a further improvement of the present invention, the electromagnetic compatibility circuit gas discharge tube GAP1, the resistance ZW1, the capacitance C6, the transformer T2, the two ends of the series circuit of the gas discharge tube GAP1 and the voltage dependent resistor ZW1 are connected to the L end and the N end of the power input end respectively, the two ends of the capacitance C6 are connected to the L end and the N end of the power input end respectively, the L end and the N end of the power input end are connected to the input end of the transformer T2, and the output end of the transformer T2 is connected to the two ends of the capacitance C1.
As a further improvement of the utility model, the L end of the power input end is connected with the fuse F1 and then connected with one end of the gas discharge tube GAP1, one end of the capacitor C6 and one input end of the transformer T2, and the N end of the power input end is connected with one end of the voltage dependent resistor ZW1, the other end of the capacitor C2 and the other input end of the transformer T2 through the temperature fuse NTC 1.
As a further improvement of the utility model, the power supply control system comprises a secondary rectification energy storage circuit, and the rectification module is connected with the power supply control module through the secondary rectification energy storage circuit; the secondary rectifying energy storage circuit comprises a capacitor C2, and the capacitor C2 is connected in parallel with the output end of the rectifying module.
As a further improvement of the present invention, the power control module comprises a power control chip, the power control chip comprises an FB terminal, a VCC terminal, a CMP terminal, a GATE terminal, a CS terminal, and a GND terminal, the current sampling circuit comprises a resistor R6, and the voltage sampling circuit comprises a resistor R7 and a resistor R8;
the switch module comprises a transistor Q1, the drain of the transistor Q1 is connected with the positive output end of the rectifier module, the GATE of the transistor Q1 is connected with the GATE end through a resistor R4, the source of the transistor Q1 is connected with the CS end, the cathode of a diode D6 and one end of a resistor R6, the other end of the resistor R6 is connected with one end of the resistor R7, an input end pin and a GND end of a high-frequency transformer T1, the other end of the resistor R7 is connected with one end and the FB end of a resistor R8, and the other end of the resistor R8 is connected with one output end of the transformer and one end of a load;
the COMP end is connected with one end of a capacitor C4;
the VCC end is connected with one end of a resistor R3, one end of a capacitor C3, one end of a resistor R2 and one end of a resistor R5, the other end of the resistor R2 is connected with the drain electrode of a transistor Q1, the other end of a resistor R3, the other end of a capacitor C3, the other end of the capacitor C4 and the other input end of the transformer are connected with the GND end;
the other end of the resistor R5 is connected to the cathode of the diode D7, and the other end of the diode D7 is connected to the other output terminal of the high-frequency transformer T1.
As a further improvement of the utility model, non-isolation constant voltage constant current output L ED drive power supply includes discharge circuit, discharge circuit includes resistance R9, and the one end of electric capacity C5, resistance R9 are connected with an output of high frequency transformer T1 respectively, and the other end of electric capacity C5, the other end of resistance R9 are connected with the output of rectifier module, and the load connects in parallel at the both ends of resistance R9, and the load passes through power output module and output interface circuit is connected.
As a further improvement of the present invention, the output interface circuit is connected to a low-voltage power supply circuit; the model of the power supply control chip is SF6771, BP3519 or OB 2374.
Compared with the prior art, the beneficial effects of the utility model are that:
adopt the technical scheme of the utility model, the data that power control module group was adopted according to voltage sampling and current sampling module are compared, output PWM wave mode control switch module, make power operation safe and reliable more, and multiple output interface has, control module circuit can conveniently connect WIFI, the RF module, the 2.4G module, the bluetooth module, infrared module, the smart module of tianmao, amazong module, the miniaturity module, the xiaoai module, GOOG L E module etc., more can realize the application scenario of intelligence house, the dimming in high pressure L ED paster lamp area, mixing of colors and various dynamic effects.
Drawings
Fig. 1 is a schematic structural diagram of a non-isolated constant voltage and constant current output L ED driving power supply of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a non-isolated constant voltage and constant current output L ED driving power supply comprises a rectification module, a secondary rectification energy storage circuit, a switch module, a power supply control module, a voltage sampling circuit, a current sampling circuit, a high frequency transformer and at least two power output modules, wherein a power supply input end is connected with the secondary rectification energy storage circuit through the rectification module, the secondary rectification energy storage circuit is connected with the power supply control module, and the power supply control module is respectively connected with the switch module, the voltage sampling circuit, the current sampling circuit and the high frequency transformer;
the switch module, the voltage sampling circuit and the current sampling circuit are respectively connected with a high-frequency transformer, the high-frequency transformer is connected with a load, and the number of the load is more than two.
The non-isolated constant-voltage constant-current output L ED driving power supply comprises an electromagnetic compatibility circuit, a power supply input end is connected with the electromagnetic compatibility circuit, the electromagnetic compatibility circuit is connected with a rectification module, two ends of a series circuit of a gas discharge tube GAP1, a resistor ZW1, a capacitor C6 and a transformer T2, the gas discharge tube GAP1 and a piezoresistor ZW1 are respectively connected with an L end and an N end of the power supply input end, two ends of a capacitor C6 are respectively connected with a L end and an N end of the power supply input end, the L end and the N end of the power supply input end are connected with an input end of a transformer T2, an output end of the transformer T2 is connected with two ends of a capacitor C1, an L end of the power supply input end is connected with a fuse F1 and then connected with one end of the gas discharge tube GAP1, one end of the capacitor C6 and one input end of the transformer T2, and the N end of the power supply input end is connected with one end of a piezoresistor ZW 1.
The secondary rectifying energy storage circuit comprises a capacitor C2, and the capacitor C2 is connected in parallel with the output end of the rectifying module.
The power supply control module comprises a power supply control chip, the power supply control chip comprises an FB terminal, a VCC terminal, a CMP terminal, a GATE terminal, a CS terminal and a GND terminal, the current sampling circuit comprises a resistor R6, and the voltage sampling circuit comprises a resistor R7 and a resistor R8; the switch module comprises a transistor Q1, the drain of the transistor Q1 is connected with the positive output end of the rectifier module, the GATE of the transistor Q1 is connected with the GATE end through a resistor R4, the source of the transistor Q1 is connected with the CS end, the cathode of a diode D6 and one end of a resistor R6, the other end of the resistor R6 is connected with one end of the resistor R7, an input end pin and a GND end of a high-frequency transformer T1, the other end of the resistor R7 is connected with one end and the FB end of a resistor R8, and the other end of the resistor R8 is connected with one output end of the transformer and one end of a load; the COMP end is connected with one end of a capacitor C4; the VCC end is connected with one end of a resistor R3, one end of a capacitor C3, one end of a resistor R2 and one end of a resistor R5, the other end of the resistor R2 is connected with the drain electrode of a transistor Q1, the other end of a resistor R3, the other end of a capacitor C3, the other end of the capacitor C4 and the other input end of the transformer are connected with the GND end; the other end of the resistor R5 is connected to the cathode of the diode D7, and the other end of the diode D7 is connected to the other output terminal of the high-frequency transformer T1.
The non-isolated constant-voltage constant-current output L ED driving power supply comprises a discharge circuit, the discharge circuit comprises a resistor R9, one end of a capacitor C5 and one end of a resistor R9 are respectively connected with one output end of a high-frequency transformer T1, the other end of a capacitor C5 and the other end of a resistor R9 are connected with the output end of a rectifying module, a load is connected in parallel with the two ends of the resistor R9, and the load is connected with an output interface circuit through a power output module.
The power output device comprises a first load, a second load, a third load, a fourth load and a fifth load, wherein the first load is an L ED lamp, the number of power output modules is four, the power output modules are respectively a first power output module, a second power output module, a third power output module and a fourth power output module, the second load is connected with the first power output module, the third load is connected with the second power output module, the fourth load is connected with the third power output module, the fifth load is connected with the fourth power output module, the first power output module, the second power output module, the third power output module and the fourth power output module are respectively connected with each interface of an output interface circuit, and the first power output module, the second power output module, the third power output module and the fourth power output module comprise a mosFET, an IGBT or a relay.
The output interface circuit comprises a WIFI module interface end, an RF module interface end, a 2.4G module interface end, a Bluetooth module interface end, an infrared module interface end, a Teddy module interface end, an Amazon module interface end, a mini module interface end, a Xiaoai module interface end and a GOOG L E module interface end, and is connected with the low-voltage power supply circuit.
Furthermore, the model of the power supply control chip is SF6771, BP3519 or OB 2374.
In this embodiment, high frequency transformer, secondary rectification energy storage module provide stable power supply for external load, and the rectification module is connected with preceding stage energy storage module C2 to be connected with the switch module, improve the output stability of power. The voltage sampling circuit mainly detects a load voltage signal for a rear stage, the voltage feedback signal is electrically connected with the power supply control module, and the voltage offset signal is input into the control module to detect the voltage. The current sampling circuit detects a voltage signal output to the high-frequency transformer by the switch module, the voltage feedback signal is electrically connected with the power supply control module, and the voltage deviation signal is input into the control module to carry out current detection. The input end of the switch module is electrically connected with the output positive terminal of the rectifying module, the output end of the switch module is connected with the current sampling module, and the control end of the switch module performs switching according to the PWM waveform output by the power supply control module. And the power supply control module regulates the PWM waveform according to the voltage signals fed back by the voltage sampling module and the current sampling module, so that the power supply stably works within a designed value range.
NTC1, fuse F1, resistance R1 restrain the effect of power-on instantaneous heavy current, the arrester air discharge tube GAP1 and the pressure-sensitive ZW1 of front end connect, the back stage of this connection is the combination circuit module of common mode inductance and electric capacity C1, have very good effects to the EMC of the whole power.
The transformer T2 is used for storing energy when the switch module is opened, and the diode D8 is used for providing a path for discharging the capacitor C5 when the switch module is closed and performing electrolytic charging on the later stage when the switch tube is closed. The other winding of the transformer T2 provides a continuous and stable working voltage for the power control module through the rectifier module. R2 is the starting module of the power control IC module and is also the regulating end of the power control module for overvoltage protection. The resistor R9 functions as no-load protection and voltage maintenance. The current sampling circuit is connected between the switch module and the high-frequency transformer, the current of the switch module is converted into voltage which can be identified by the power supply control module through sampling of the resistor R6 current sampling circuit, and the voltage is input into the power supply control module through the resistor R7 module. The voltage of the secondary energy storage module and the current output by the current sampling circuit are sampled, the power supply control module compares the voltage with the current sampled by the current sampling circuit, and outputs a PWM wave type to control the switch module, so that the power supply works in a safe design value range. The power supply control module can realize that when the current does not exceed the designed maximum current, the power supply works in a constant voltage mode, and when the power supply exceeds the designed current, the power supply works in a constant current mode, the output voltage is reduced, and the working stability of the power supply is ensured.
Power output module and multiple output interface circuit connect, power output module mainly includes high-power mosFED, IGBT or relay, this kind of module has output current big, output is high, calorific capacity is little, advantages such as reaction rate is fast, multiple output interface circuit is convenient to be connected with the singlechip, can conveniently connect the WIFI module, the RF module, the 2.4G module, the bluetooth module, infrared module, the smart module of tianmao, amazong module, the miniaturity module, the xiaoai module, GOOG L E module etc, more can realize the application scenario of intelligent house, the light modulation in high pressure L ED paster lamp area, mixing of colors and various dynamic effects.
The power output module in this embodiment includes a high level driving module output and a low level driving module output, where a module composed of the first power output module, the second power output module, and the third power output module is the high level driving module output, and a driving module composed of the third power output module and the fourth power output module is the low level driving module output. The various output interface circuits are used to determine which control module interface circuit to use based on signals provided by various external controls.
The above-mentioned embodiments are the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above-mentioned embodiments, and the scope of the present invention includes and is not limited to the above-mentioned embodiments, and all equivalent changes made according to the shape and structure of the present invention are within the protection scope of the present invention.
Claims (9)
1. A non-isolated constant-voltage constant-current output L ED driving power supply is characterized by comprising a rectifying module, a switch module, a power supply control module, a voltage sampling circuit, a current sampling circuit, a high-frequency transformer and at least two power output modules, wherein a power supply input end is connected with the power supply control module through the rectifying module, and the power supply control module is respectively connected with the switch module, the voltage sampling circuit, the current sampling circuit and the high-frequency transformer;
the switch module, the voltage sampling circuit and the current sampling circuit are respectively connected with a high-frequency transformer, the high-frequency transformer is connected with a load and at least two power output modules, and the power output modules are connected with an output interface circuit;
the power output module comprises a mos FET, an IGBT or a relay.
2. The non-isolated constant voltage and constant current output L ED driving power supply of claim 1, wherein the output interface circuit includes at least two of a WIFI module interface terminal, an RF module interface terminal, a 2.4G module interface terminal, a Bluetooth module interface terminal, an infrared module interface terminal, a Tianmao eidolon module interface terminal, an Amazon module interface terminal, a mini module interface terminal, a Xiaoai module interface terminal, and a GOOG L E module interface terminal.
3. The non-isolated constant voltage and constant current output L ED driving power supply of claim 1, wherein the power supply comprises an electromagnetic compatibility circuit, the power supply input terminal is connected with the electromagnetic compatibility circuit, and the electromagnetic compatibility circuit is connected with the rectification module.
4. The non-isolated constant voltage and constant current output L ED driving power supply of claim 3, wherein the series circuit of the gas discharge tube GAP1, the resistor ZW1, the capacitor C6 and the transformer T2 of the electromagnetic compatibility circuit, the gas discharge tube GAP1 and the voltage dependent resistor ZW1 have two ends respectively connected with the L end and the N end of the power input end, the capacitor C6 has two ends respectively connected with the L end and the N end of the power input end, the L end and the N end of the power input end are connected with the input end of the transformer T2, and the output end of the transformer T2 is connected with two ends of the capacitor C1.
5. The non-isolated constant voltage and constant current output L ED driving power supply of claim 4, wherein the power supply input terminal L is connected to a fuse F1 and then to one terminal of a gas discharge tube GAP1, one terminal of a capacitor C6 and one input terminal of a transformer T2, and the input terminal N is connected to one terminal of a voltage dependent resistor ZW1, the other terminal of the capacitor C2 and the other input terminal of a transformer T2 through a thermal fuse NTC 1.
6. The non-isolated constant-voltage constant-current output L ED driving power supply as claimed in any one of claims 1-5, comprising a secondary rectifying energy storage circuit, wherein the rectifying module is connected with the power supply control module through the secondary rectifying energy storage circuit, the secondary rectifying energy storage circuit comprises a capacitor C2, and the capacitor C2 is connected in parallel with the output end of the rectifying module.
7. The non-isolated constant voltage and constant current output L ED driving power supply of claim 2, wherein the power control module comprises a power control chip, the power control chip comprises an FB terminal, a VCC terminal, a CMP terminal, a GATE terminal, a CS terminal and a GND terminal, the current sampling circuit comprises a resistor R6, and the voltage sampling circuit comprises a resistor R7 and a resistor R8;
the switch module comprises a transistor Q1, the drain of the transistor Q1 is connected with the positive output end of the rectifier module, the GATE of the transistor Q1 is connected with the GATE end through a resistor R4, the source of the transistor Q1 is connected with the CS end, the cathode of a diode D6 and one end of a resistor R6, the other end of the resistor R6 is connected with one end of the resistor R7, an input end pin and a GND end of a high-frequency transformer T1, the other end of the resistor R7 is connected with one end and the FB end of a resistor R8, and the other end of the resistor R8 is connected with one output end of the transformer and one end of a load;
the COMP end is connected with one end of a capacitor C4;
the VCC end is connected with one end of a resistor R3, one end of a capacitor C3, one end of a resistor R2 and one end of a resistor R5, the other end of the resistor R2 is connected with the drain electrode of a transistor Q1, the other end of a resistor R3, the other end of a capacitor C3, the other end of the capacitor C4 and the other input end of the transformer are connected with the GND end;
the other end of the resistor R5 is connected to the cathode of the diode D7, and the other end of the diode D7 is connected to the other output terminal of the high-frequency transformer T1.
8. The non-isolated constant voltage and constant current output L ED driving power supply as claimed in claim 7, wherein the power supply comprises a discharge circuit including a resistor R9, one end of a capacitor C5 and one end of a resistor R9 are respectively connected with an output terminal of a high frequency transformer T1, the other end of a capacitor C5 and the other end of a resistor R9 are connected with an output terminal of a rectifier module, a load is connected in parallel with two ends of the resistor R9, and the load is connected with the output interface circuit through a power output module.
9. The non-isolated constant voltage and constant current output L ED driving power supply of claim 8, wherein the output interface circuit is connected with a low voltage power supply circuit, and the power control chip is SF6771, BP3519 or OB2374 in type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922050949.3U CN211047315U (en) | 2019-11-25 | 2019-11-25 | Non-isolated constant-voltage constant-current output L ED driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922050949.3U CN211047315U (en) | 2019-11-25 | 2019-11-25 | Non-isolated constant-voltage constant-current output L ED driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211047315U true CN211047315U (en) | 2020-07-17 |
Family
ID=71539047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922050949.3U Expired - Fee Related CN211047315U (en) | 2019-11-25 | 2019-11-25 | Non-isolated constant-voltage constant-current output L ED driving power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211047315U (en) |
-
2019
- 2019-11-25 CN CN201922050949.3U patent/CN211047315U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103248108B (en) | Switch and the LED driver of reusable DC-DC module with metal-oxide-semiconductor | |
| CN103607009B (en) | A kind of charge-discharge circuit with automatic protection functions | |
| CN103427656B (en) | A kind of crisscross parallel inverse-excitation type LED drive power and PFM control circuit thereof | |
| CN203225573U (en) | Power-storing LED driver employing switching MOS tube and DC-DC module capable of multiplexing | |
| CN103475061A (en) | Photovoltaic intelligent controller | |
| CN102665322B (en) | Driving power supply without electrolytic capacitor | |
| CN102595717B (en) | Protection circuit of light-emitting diode (LED) lamp driving power supply and LED lamp driving power supply | |
| CN104185333A (en) | Constant-current constant-voltage circuit and illuminating device | |
| CN203313500U (en) | Silicon controlled dimming LED driving circuit | |
| CN103401428A (en) | Switch power supply control chip and switch power supply control system | |
| CN203387399U (en) | Low-standby power consumption active power factor correction module | |
| CN202424283U (en) | Charger based on single-chip three-end TOP22X integrated chip | |
| CN206136377U (en) | LED lighting supply source driver chip and drive circuit | |
| CN102891523A (en) | Aging control method and system for electrical energy self-circulation type high-power charger | |
| CN201063531Y (en) | Power supply converting circuit and pulse width modulation controller | |
| CN102810986B (en) | A kind of series topology LED switch power circuit | |
| CN211047315U (en) | Non-isolated constant-voltage constant-current output L ED driving power supply | |
| CN106535418A (en) | LED drive chip and drive circuit | |
| CN206117538U (en) | Switching power supply circuit device that convergence was inputed in zero standby | |
| CN111614276A (en) | Be applied to high efficiency CT of electric wire netting product and get electric circuit | |
| CN106507531A (en) | A kind of LED illumination power drives chip and drive circuit | |
| CN207491249U (en) | Emergent module | |
| CN201955393U (en) | Single-phase guide rail type carrier wave electric energy meter | |
| CN206341455U (en) | LED drive chip and drive circuit | |
| CN205176685U (en) | Adopt bridge rectifier to pile temperature -control circuit of rectification design |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200717 |